Trane EHUMD800ASM00BA Steam Humidifier Owner's manual

Brand: Trane

Model: EHUMD800ASM00BA Steam Humidifier

Type: Owner's manual

Steam Humidifier

EHUMD800ASM00BA / EHUMD800BSMLCBA

TABLE OF CONTENTS

Safety Cautions..........................................2

Materials List ...........................................3

Principles & Sequence of Operation.......................3

Specifications & Dimensions .............................4

Installation Instructions ..................................7

Choosing a Location .....................................7

- Dispersion Tube Location ..............................7

- Elevation ...........................................8

- Distance from Humidifier to Dispersion Tube ..............9

- Humidifier Location..................................10

Prepare Humidifier for Mounting ..........................11

Install Steam Dispersion Tube ............................11

Mount Humidifier ......................................11

Install Steam Hose .....................................11

Supply Water..........................................11

Drain Line.............................................12

Electrical Power Wiring & Shut-off Switch ..................12

Control Wiring .........................................17

Start-up Procedure .....................................19

Operating Modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19

Shut Down Procedure...................................20

Display Panel ..........................................20

Maintenance...........................................21

Troubleshooting Guide ..................................23

Steam Humidifier

Installation & Maintenance Instructions

Trane

6200 Troup Highway • Tyler, TX 75711-9010

READ AND SAVE THESE INSTRUCTIONS

18-CH87D1-1D

10016618 B2210106A 10.22

CAUTION

ATTENTION INSTALLER

Read this manual before installing. This product must be installed by qualiﬁed HVAC and electrical contractors and in

compliance with local, state, federal, and governing codes. Improper installation can cause property damage, severe personal

injury, or death as a result of electric shock, burns, or ﬁre.

Read all cautions and instructions.

Read this manual before performing service or maintenance procedures on any part of the system. Failure to follow all cautions

and instructions could produce the hazardous situations described, resulting in property damage, personal injury, or death.

Failure to follow the instructions in this manual can cause moisture to accumulate, which can cause damage to structure and

furnishings.

HOT SURFACES AND HOT WATER

This steam humidiﬁcation system has extremely hot surfaces. Water in steam canister, steam pipes, and dispersion tube can

be as hot as 212°F (100°C). Discharged steam is not visible. Contact with hot surfaces, discharged hot water, or air into which

steam has been discharged can cause severe personal injury. To avoid severe burns, follow procedures in this manual when

performing service or maintenance procedures on any part of the system.

DISCONNECT ELECTRICAL POWER

Disconnect electrical power before installing supply wiring or performing service or maintenance procedures on any part of

the humidiﬁcation system. Failure to disconnect electrical power could result in ﬁre, electrical shock, and other hazardous

conditions. These hazardous conditions could cause property damage, personal injury, or death.

Contact with energized circuits can cause property damage, severe personal injury, or death as a result of electrical shock or

ﬁre. Do not remove access panels unless electrical power is disconnected.

Follow the shutdown procedure in this manual before performing service or maintenance procedures on any part of the system.

ELECTRICAL SHOCK HAZARD

If the humidiﬁer starts up responding to a call for humidity during maintenance, severe injury or death from electrical shock could

occur. Follow the procedures in this manual before performing service or maintenance procedures on this humidiﬁer.

EXCESSIVE SUPPLY WATER PRESSURE

Supply water pressure greater than 120 psi may cause the humidiﬁer to overﬂow.

SHARP EDGES

Sharp edges may cause serious injury from cuts. Use care when cutting plenum openings and handling ductwork.

EXCESS HUMIDITY

Do not set humidity higher than recommended. Condensation may cause damage to structure and furnishings.

SAFETY CAUTIONS

MATERIALS LIST

MATERIALS FURNISHED WITH MODEL

EHUMD800ASM00BA / EHUMD800BSMLCBA

Humidifier

Manual humidistat and blower activation relay

Dispersion tube

Steam hose (6 feet)

7/8” I.D. drain tubing (10 feet)

Hose clamps

Saddle valve

Mounting screws

The Steam Humidifier delivers humidity in the form of

steam to the conditioned space via the HVAC system

duct. The humidifier generates steam by energizing two

electrodes that extend into a canister of water. Current

flowing between the electrodes causes the water to boil,

creating steam. Water is introduced to the humidifier

through a fill valve to a fill cup located in the top of the

cabinet. The fill cup serves as an overflow reservoir and

provides an air gap between the humidifier and water

source. The steam canister is filled from the bottom. The

canister is seated in a drain cup assembly which includes

a drain valve. The drain and fill valves work together to

maintain water level in the canister to deliver the rated

steam capacity based on the electrical conductivity of

the water and to temper drain water. See Figure 1 for

representation of fill and drain system and canister.

To control the Steam Humidifier as part of the HVAC

system, a Connected Thermostat Control with an integral

humidistat is installed to detect the RH level in the duct.

When the humidistat detects RH below the set point, and

the humidifier and HVAC system blower are operating,

the humidifier energizes the electrodes to provide steam.

Steam is delivered into the duct work via the steam hose

and through the dispersion tube. The dispersion tube

is fitted with opening called “Tubelets™”. The design of

the dispersion tube and Tubelets distribute steam over a wide area in the duct and direct any condensed moisture back into the steam hose. A

blower activation relay is included to turn on the HVAC system blower to maintain the proper RH level even when the furnace or air handler is in

stand-by mode. When using a Connected Thermostat Control with the Steam Humidifier, the provided manual humidistat and blower activation

relay are not used.

PRINCIPLES & SEQUENCE OF OPERATION

FIGURE 1 – Fill and Drain System and Canister

Steam Hose

Dispersion T

ube

in Duct

Tubelets

Steam

Outlet

Drain

Supply

Water

Drain Cup

Drain Valve

Canister

Electrodes

High Water Level Sensor

Inlet

Fill V

alve

Overflow

Fill

90-1522

NOT FURNISHED

Main power disconnect switch

Wiring

1/4” O.D. supply water tubing

Boards for mounting (if required)

SPECIFICATIONS & DIMENSIONS

This humidifier is able to produce steam at various capacities depending on the voltage and current applied. The unit can be wired to use an

input voltage of 120, 208 or 240 Volts and input amperage can be set to 11.5 or 16.0 amps by changing a dip switch on the control circuit board

(see the Electrical Power Wiring & Shut Off Switch section on page 12). Configure the unit appropriately for the application (see Table 1 for

capacity specifications).

TABLE 1 – Humidifier Capacities and Recommended Home Sizes

Amperage Voltage Maximum steam

capacity (gal/day)

Maximum recommended home size in ft2*

Tight Average Loose

11.5

120V 11.5 2,500 sq ft 1,500 sq ft 1,000 sq ft

208V 20.5 4,500 sq ft 2,500 sq ft 1,500 sq ft

240V 23.3

16.0

120V 16.0 3,500 sq ft 2,000 sq ft 1,500 sq ft

208V 30.0 6,000 sq ft 4,000 sq ft 2,500 sq ft

240V 34.6

* Assumes 8 ft ceiling height, adjust as necessary for higher ceilings. For homes with multiple furnaces/air handlers a humidifier should be installed on each.

Steam Humidifier Shipping Weight: 28 lbs

Humidifier Operating Weight: 23 lbs**

** As minerals precipitate unit weight can increase to approximately 30 lb.

3-3/8

7-7/8

8-7/8

3-3/8 1-5/8

4-1/4 5-3/4

Dispersion Outlet

Electrical Knockouts

Fill Cup

TOP VIEW

7-1/8

SIDE VIEW

BACK VIEW

Mounting

Holes

3-3/8

7-7/8

6-5/8

9-1/8

1-7/8

Water

Fill Line

Connection

Drain

BOTTOM VIEW

Electrical

Knockouts

3 sq

2 sq

1-3/4

8-1/4

1 dia

10-1/8

20-7/8

FRONT VIEW

FIGURE 2 – Humidifier Dimensions (inches)

90-1518

SPECIFICATIONS & DIMENSIONS (CONTINUED)

3-3/8

7-7/8

8-7/8

3-3/8 1-5/8

4-1/4 5-3/4

Dispersion Outlet

Electrical Knockouts

Fill Cup

TOP VIEW

7-1/8

SIDE VIEW

BACK VIEW

Mounting

Holes

3-3/8

7-7/8

6-5/8

9-1/8

1-7/8

Water

Fill Line

Connection

Drain

BOTTOM VIEW

Electrical

Knockouts

3 sq

2 sq

1-3/4

8-1/4

1 dia

10-1/8

20-7/8

FRONT VIEW

Steam Dispersion Tube

90-1518

SPECIFICATIONS & DIMENSIONS (CONTINUED)

Minerals that are naturally found in water contribute to water’s electrical conductivity; water conductivity is measured in microsiemens per

centimeter (uS/cm). Mineral content, also described as “water hardness” is usually measured in grains per gallon. Variation is found among

water samples but generally the higher the mineral content, the higher the conductivity.

The Steam Humidifier is designed to operate on water with conductivity between 100 and 1,250 uS/cm. This correlates loosely with water

hardness between 3 and 36 grains/gallon. Water that is considered “hard” and softened water work well in the Steam Humidifier. The humidifier

makes steam when plumbed to low-conductivity water but it takes longer to reach nominal current.

Two canisters are available for use with the Steam Humidifier. The Model 8043RP canister is used in most installations and is optimized for

“hard” and softened water. The Model 8043RP typically works best when the Steam Humidifier is installed at 208 or 240 VAC. If the Steam

Humidifier has a yellow steam light in the first two weeks of running with a new canister, the Steam Humidifier is taking a long time to reach its

nominal current; changing to the Model 8043LCRP canister will prevent this from happening in the future.

The Model 8043LCRP canister is optimized for use in areas where the water conductivity is less than 300 uS/cm or when the Steam Humidifier is

installed at 120VAC. The Model 8043LCRP should not be used with softened water. If the Steam Humidifier is draining too frequently, the water

conductivity is too high; changing to the Model 8043RP canister will reduce the drain frequency.

As water in the canister boils and turns into steam, minerals are left behind. Minerals remaining in solution increase the conductivity of the

water. Minerals also deposit onto the submerged portions of the electrodes rendering those areas ineffective. As this occurs, the level of water

in the canister rises to expose uncoated electrode surface.

There are benefits and trade-offs to consider when the application allows a choice between hard and softened water:

Hard water: The benefit of hard water is less frequent draining and filling than with soft water, which results in better energy and water

efficiency and more consistent steam output. However, canister replacement could be more frequent with hard water, because mineral deposits

coat the electrodes. The harder the water, the more frequent the need for a new canister.

Softened water: The benefit of softened water is longer canister life (depending on water chemistry) than with hard water, because softened

water does not coat the electrodes nearly as much as hard water. However, softened water ions stay in solution to much higher concentrations

than hard water ions. This requires more frequent draining and filling, which results in lower energy efficiency, higher water consumption and

less consistent steam output.

TABLE 2 – Water Quality Guidelines

Conductivity

(uS/cm) Grains/Gal Hardness Recommended Canister by Voltage

120VAC 208VAC 240VAC

75-100 0-3 Naturally Soft Installation Not

Recommended 8043LCRP 8043LCRP

100-300 3-9 Naturally Soft 8043LCRP 8043LCRP 8043LCRP

300-500 9-15 Slightly Hard 8043LCRP 8043RP 8043RP

500-650 15-20 Moderately Hard 8043LCRP 8043RP 8043RP

650-850 20-25 Hard 8043LCRP 8043RP 8043RP

850-1250 25-36 Very Hard 8043LCRP 8043RP 8043RP

above 1250 above 36 Extremely Hard Installation Not Recommended

Softened 8043RP 8043RP 8043RP

WATER QUALITY

CHOOSING A LOCATION

DISPERSION TUBE LOCATION

When choosing a location for the dispersion tube three things must be considered: location in duct, elevation with respect to the humidifier, and

distance from humidifier to dispersion tube.

Duct Location and Absorption Distance

Absorption distance, the unobstructed straight line distance needed for steam to be fully absorbed, is dependent on air velocity, air temperature

and relative humidity in the duct. Determine absorption distance based on the lowest duct temperature, lowest air velocity and

highest humidity that the system will experience. The dispersion tube must be located in a straight section of duct far enough upstream of

any obstructions or bends in the duct. Use Table 3 to determine the appropriate absorption distance.

Operation during AC calls is not recommended because of the potential for condensation in the ductwork. Conﬁgure controls to lock out the

humidiﬁer during AC calls and use the blower activation feature to allow the humidiﬁer to run with the blower only.

The dispersion tube must be mounted with the plate on a vertical surface with the tube angled up as shown in Figure 3. The steam tubelets

must face up regardless of the airﬂow direction in the duct. The plate is labeled “UP”to indicate proper orientation. On horizontal duct runs

install the dispersion tube low in the duct, on vertical runs center the tube on the duct.

If the dispersion tube is mounted on insulated ductwork, make sure insulation is not more than 2” thick at tube location to prevent insulation

from blocking ﬁrst steam outlet.

Note: If dispersion tubes for two humidiﬁers are installed in one duct, double the dispersion distances. If three dispersion tubes are installed,

triple the dispersion distance. Position dispersion tubes so one does not discharge directly onto another.

INSTALLATION INSTRUCTIONS

Do not mount humidifier in a location where operating ambient temperatures exceed 140°F or where freezing temperatures

may occur.

CAUTION

Each humidiﬁer requires its own steam hose and dispersion tube. Do not connect steam hoses from more than one humidiﬁer

together. Back-pressure from one humidiﬁer can lower the water level in the canister in the other humidiﬁer and cause

operational problems.

Do not install the dispersion tube in a duct with greater than 2 in. wg static pressure. High duct pressure can cause back-

pressure in the canister which can result in unstable unit operation.

TABLE 3 – Absorption Distance (Minimum distance from dispersion tube downstream to any obstruction or bend in duct)

Humidifier

Output (gal/day) Airflow Velocity* 70°F & 30% RH

Setpoint 70°F & 45% RH

Setpoint 65°F & 45% RH

Setpoint 45°F & 45% RH

Setpoint

Up to 16.0

300 fpm 13” 19” 23” 30”

600 fpm 6” 10” 12” 18”

1200 fpm 3” 5” 6” 13”

1800 fpm 2” 3” 4” 10”

20.5 – 25.0

300 fpm 15” 23” 28” 45”

600 fpm 6” 12” 13” 26”

1200 fpm 5” 6” 7” 19”

1800 fpm 3” 4” 5” 16”

25.0 – 35.0

300 fpm 24” 31” 36” 60”

600 fpm 17” 22” 26” 48”

1200 fpm 12” 15” 18” 25”

1800 fpm 10” 13” 15” 20”

*Velocity in feet per minute = Duct airflow volume in cubic feet per minute / duct area in square feet.

Example: 1,200 cfm through 16” x 12” duct = 1,200/(12 x 16/144 sq. in./sq ft.) = 1,200/1.333 = 900 fpm

INSTALLATION INSTRUCTIONS (CONTINUED)

ELEVATION

The preferred location for the dispersion tube is higher than the

humidifier so that the steam hose has a constant downward slope of at

least 2” per foot from the dispersion tube to the humidifier. If hard pipe

is used, the slope can be 1/4” per foot. With the constant downward

slope, any condensation that forms in the steam hose will drain back

into the steam canister. See Figure 3.

FIGURE 3 – Dispersion Tube Mounted Above Humidifier

90-1704

90° long sweep

or two 45° elbows

Pitch*

Duct

Dispersion

tube

5” minimum

Steam hose or pipe.

Insulate pipe with 1” fiberglass

to reduce steam loss.

* Pitch steam hose down

from dispersion tube to

humidifier:

2”/ft (15%) minimum

when using steam hose.

1/4”/ft when using

hard pipe.

Pitch

Obstruction

90° long

sweep or two

45° elbows

6" min

8" min

Insulate hard pipe to

reduce steam loss

Dispersion

Tube

1" air gap

Open drain required,

see note 1.

Drip tee installation for

piping over obstruction,

or if dispersion tube is

lower than humidifier

NOTES:

1. Refer to governing codes for

drain pipe size and materials.

2. Support steam hose so there

are no sags or low spots.

Drip tee

Part #5628RP

Drain trap

FIGURE 4 – Dispersion Tube Mounted Below Humidifier

90-1703

FIGURE 5

90-1705

Steam Hose

Dispersion

Tube

Steam Hose

1-1/2" Hose Clamp

1" Copper Pipe

3/4" x 1"

Reducing Coupling

Humidifier

#5628RP KIT

CONTENTS:

Hose Clamps (5)

Trap (1)

Tee Assembly (1)

Steam Hose

1" I.D.

(Downward

Slope from

Humidifier

to T

ee) Tee

Assembly

Flared

End

Trap

Note: Prime with water

before using humidifier

Hose Clamp

Hose

Clamp

Hose Clamp

To Steam

Dispersion Tube

Steam

Hose

1" I.D.

Steam Hose, 1" I.D.

(Downward Slope to Tee)

Drain Hose

7/8" I.D.

Steam

Humidifier

FIGURE 6

90-1844

If the dispersion tube must be mounted below the humidifier or

if the steam hose needs to run up and over an obstruction, a drip

tee with drain trap, Part #5628RP, must be installed as shown in

Figure 4.

NOTICE

CONTROL CONDENSATE FLOW AND COLLECTION.

Failure to follow steam hose recommendations in this

manual can result in reduced or erratic performance,

increased noise and condensate in the duct.

DISTANCE FROM HUMIDIFIER TO DISPERSION TUBE

The capacity of the humidifier is reduced by the length of

the steam hose or pipe due to condensation. The maximum

recommended length of steam hose is 6 feet. Use hard pipe

insulated with 1” thick insulation rated for 212°F or higher

for lengths greater than 6 feet. Table 4 provides humidifier

capacity with various lengths of steam hose and pipe. If 6-foot

steam hose does not reach from humidifier to dispersion tube,

splice in 1” copper pipe using 3/4” x 1” reducing couplings as

shown in Figure 6.

INSTALLATION INSTRUCTIONS (CONTINUED)

TABLE 4 – Steam Humidifier Capacity in Gallons/Day

Steam

Hose or

Insulated

Pipe

Length

120 Volts 208 Volts 240 Volts

11.5 Amps 16.0 Amps 11.5 Amps 16.0 Amps 11.5 Amps 16.0 Amps

Steam

Hose Insulated

Pipe Steam

Hose Insulated

Pipe Steam

Hose Insulated

Pipe Steam

Hose Insulated

Pipe Steam

Hose Insulated

Pipe Steam

Hose Insulated

Pipe

< 2 ft. 11.5 11.5 16.0 16.0 20.5 20.5 30.0 30.0 23.3 23.3 34.6 34.6

2 ft. 11 11 15.5 15.5 20 20 29 29.5 23 23 34 34

4 ft. 10 11 14.5 15.5 19 20 28 29.5 22 23 33 34

6 ft. 911 13.5 15 18 20 27 29 21 22 32 33

8 ft. 10 14 19 28 22 33

10 ft. 10 14 19 28 22 33

12 ft. 10 14 19 28 22 33

14 ft. 913 18 27 21 32

16 ft. 913 18 27 21 32

18 ft. 913 18 27 21 32

20 ft. 913 18 27 20 31

HUMIDIFIER LOCATION

Do not mount humidifier in a location where operating

ambient temperature exceeds 140°F or where freezing

temperatures may occur. Extreme temperatures may cause the

humidifier to leak which can damage furnishings or structure.

Mount humidifier in a location that allows access for servicing, and

clearance to remove front panel for replacing the canister and side

panel for access to the electrical components during installation.

See Figure 7 for minimum clearances around humidifier.

The humidifier should be mounted as close to the dispersion

tube as possible. Table 4 shows how capacity is reduced as the

distance between the humidifier and dispersion tube increases. If

the humidifier is mounted on the duct directly below the dispersion

tube, allow space for a bend in the steam hose. Allow a minimum

of 2” of steam hose to extend straight out of the humidifier before

beginning any bends; this will help ensure a tight connection with

the top of the canister.

The humidifier can be mounted to a wood surface, or to sheet

metal ductwork if it is structurally stable. Do not mount humidifier

to fiber duct board. Sound isolation may be desired when mounting

to sheet metal ductwork.

The humidifier must be mounted to a vertical surface and must be

mounted level in the upright position.

INSTALLATION INSTRUCTIONS (CONTINUED)

16" for

Steam

Hose

30" for

Service

Access

16" for

Electrical

Access

16"

for Drain

FRONT VIEW

SIDE VIEW

FIGURE 7 – Clearances

90-1702

SUPPLY WATER

Plumb the humidifier to cold, hard or softened water. Do not use hot water because unheated supply water is used to cool water

draining from the humidifier. Do not use demineralized or reverse osmosis water. For proper operation, supply water pressure must be between

25 psi and 120 psi. Hard or softened water may be used provided it has conductivity between 125 microS/cm and 1250 microS/cm. See Table 2.

Supply water piping must be free of oils, lubricants, solder flux and other contaminants, which can cause foaming.

Follow local plumbing codes. An external backflow preventer may be needed.

Install the saddle valve according to the instructions printed on the bag, or install a tee with a shut-off valve to an accessible cold water pipe.

Run 1/4” copper tubing from the saddle valve/shut-off valve to the humidifier. Connect it to the fill valve. Double wrench to prevent leaking and

damage to valve. Addition of a stainless steel braided water line can help reduce valve noise.

Note: Adding an inline particulate filter can increase canister life in areas with high levels of suspended solids. DO NOT use filters that release

scale inhibitors, filters of this type can significantly decrease canister life.

PREPARE HUMIDIFIER FOR MOUNTING

Unpack carton. Open front panel by removing screw and lifting panel up and away from humidifier. Disconnect three wires from top of canister

by pulling straight up. The two large wires are the electrode conductors. The smaller wire is connected to the high water level sensor. Remove

canister by pulling it up and out of drain assembly. Remove two screws on right side of humidifier and lift side panel off housing to expose

electrical compartment.

MOUNT HUMIDIFIER

Secure humidifier to sturdy wall using screws provided, or to sheet metal duct. Humidifier initially weighs 23 lbs with a full canister, but will

increase in weight over time due to the precipitation of minerals inside the canister. Make sure mounting system will support weight. If mounting

to a stud-framed wall, install two spanner boards to studs and fasten humidifier to spanner boards. Make sure humidifier is mounted plumb.

INSTALL STEAM DISPERSION TUBE

Make sure steam dispersion tube is mounted higher than the humidifier so that condensation that forms in the steam hose runs back into the

canister. If the dispersion tube cannot be mounted higher than the humidifier or if the steam hose must extend up from the humidifier then down

to the dispersion tube due to an obstruction, a drip tee and drain trap system (Part #5628RP) must be installed as shown in Figure 4.

Drill a 1-1/4” diameter hole in a vertical surface of the duct at the location chosen for the dispersion tube. Position the dispersion tube so it is

angled up, regardless of airflow direction. UP is stamped on the mounting bracket to aid in proper installation. Secure with four sheet metal

screws provided.

INSTALLATION INSTRUCTIONS (CONTINUED)

Six feet of steam hose is provided with the humidifier. If the steam hose must be cut, use a hacksaw. If additional length is required, use

1” O.D. metal or copper pipe. Do not use PVC pipe for steam line. Insulate pipe with 1” thick insulation rated for 212°F or higher to reduce

steam loss. See Table 4 for humidifier capacity at various lengths of steam hose and pipe.

Use the steam hose provided. Other hoses may have impurities which can cause foaming in the canister. Foaming can cause water level

inaccuracies, reduced steam production and water sputtering into the duct. When using pipe, remove all traces of residual materials used to

connect the pipe to prevent foaming.

Verify that the O-ring is in place in the groove in the drain assembly. Dampen the O-ring with water (DO NOT use oil, grease, or any lubricant

besides water), then reinsert the canister with the caution label positioned toward the front of the unit.

Attach steam hose to dispersion tube and then to top of canister using hose clamps provided. Make sure steam hose has a constant slope of at

least 2” per foot between the dispersion tube and the humidifier. Any and every low spot in the steam hose or pipe must have a drip tee and drain

trap. Fill drain trap with water before making final connections. Support the steam hose in multiple locations over its span to prevent sagging.

Attach and fully seat the electrode conductors (interchangeable) and the high water level sensor wire to the top of the canister.

INSTALL STEAM HOSE

DRAIN LINE

Attach the 7/8” I.D. drain tubing provided to the drain assembly at the bottom of the humidifier. Secure with the hose clamp provided. Do not

over tighten.

Make sure the drain line has a constant downward slope from the humidifier to the drain and is not kinked or blocked.

If floor drain is not available, use condensate pump (Part #4856) to route water to a suitable drain. Provide at least 16 inches for of drain line

between the Steam Humidifier and the condensate pump.

Note: The humidifier uses cold water to temper drain water to less than 140°F.

INSTALLATION INSTRUCTIONS (CONTINUED)

ELECTRICAL POWER WIRING & SHUT-OFF SWITCH

All wiring must be installed in accordance with all governing electrical codes and with the wiring diagram provided inside the front panel.

Do not loop power wiring.

Do not use aluminum wire.

A safety grounding system that meets all governing electrical codes is required. The ground connection must be made with solid metal to metal

connections. Ground wire must be the same size as the power wiring.

With factory settings, the Steam Humidifier draws 11.5 amps +/- 10%. Use a minimum 20 amp dedicated circuit when installing to

operate at 11.5 amps. The Steam Humidifier can be set to draw 16.0 amps +/- 10% by repositioning dip switch #1 on the control

circuit board (see Figure 8). When set to 16 amps, use a minimum 25 amp dedicated circuit. For both applications, size wire

according to local codes.

The Steam Humidifier is shipped from the factory wired for 240 VAC operation, but it can operate on 120, 208 or 240 VAC. If using 120V or

208V, move the black/white jumper wire to the proper tab on the control circuit board. See Figures 9, 10, 11.

WIRING INSTRUCTIONS

Install disconnect switch (not provided) between line power source and humidifier.

Knock-outs for power wiring and low voltage control circuit wiring are provided.

Connect power and ground wiring as shown in appropriate wiring diagram.

• 240 VAC – Figure 9

• 208 VAC – Figure 10

• 120 VAC – Figure 11

Do not run high voltage power lines over internal circuit boards.

CAUTION

Only qualiﬁed electrical personnel should perform ﬁeld wiring procedures. Improper wiring or contact with energized circuits

can cause property damage or severe personal injury.

INSTALLATION INSTRUCTIONS (CONTINUED)

Factory setting for

11.5 AMP nominal

operation.

Slide Dip Switch #1

to “ON” position

for 16.0 AMP

nominal operation.

LED D8

90-1959

FIGURE 8 – Control Circuit Board with Dip Switches

INSTALLATION INSTRUCTIONS (CONTINUED)

L2 / N

GND

J8 J10 J16

J5 J6

CONTROL CIRCUIT WIRING

HIGH VOLTAGE WIRING

HIGH VOLTAGE FIELD WIRING

DRAIN

VALVE

FILL

VALVE

DISPLAY PANEL

RIBBON CABLE

BLK

YEL

BLK YEL

TRANSFORMER POWER

JUMPER WIRE

BLK/WHT

WHT

RED

BLK

ORG

YEL

BLUE

MAIN POWER BREAKER

(NOT PROVIDED)

TRANSFORMER

J11

120

VAC

J13

208

VAC

J14

240

VAC

LOW VOLTAGE FIELD WIRING

SLOW BLOW FUSE

(5X20mm 5A)

ELECTRODE

WATER LEVEL

PROBE

ELECTRODE

STEAM CANISTER

HUMIDISTAT

FAN PACK

CON1

RESIDENTIAL STEAM HUMIDIFIER

IS SHIPPED FROM THE FACTORY

WIRED FOR 240 VOLTS.

HUMIDITY CONTROL

(PROVIDED)

FAN PACK

(OPTIONAL)

DOOR SWITCH

ORANGE

DRY

CONTACT

POWER

TERMINAL

BLOCK

FIGURE 9 – 240 VAC Wiring Diagram when using Supplied Humidistat

90-1903

INSTALLATION INSTRUCTIONS (CONTINUED)

J8 J10 J16

J5 J6

CONTROL CIRCUIT WIRING

HIGH VOLTAGE WIRING

HIGH VOLTAGE FIELD WIRING

BLK

YEL

TRANSFORMER POWER

JUMPER WIRE

BLK/WHT

HUMIDITY CONTROL

(PROVIDED)

FAN PACK

(OPTIONAL)

DOOR SWITCH

ORANGE

DRY

CONTACT

YEL

BLUE

TRANSFORMER

J11

120

VAC

J13

208

VAC

J14

240

VAC

ELECTRODE

WATER LEVEL

PROBE

ELECTRODE

STEAM CANISTER

LOW VOLTAGE FIELD WIRING

WHT

RED

BLK

ORG

FAN PACK

HUMIDISTAT

RESIDENTIAL STEAM HUMIDIFIER

IS SHIPPED FROM THE FACTORY

WIRED FOR 240 VOLTS. MOVE THE

JUMPER WIRE TO TERMINAL J13

TO OPERATE AT 208VAC.

MAIN POWER BREAKER

(NOT PROVIDED)

L2 / N

GND

DRAIN

VALVE

FILL

VALVE

DISPLAY PANEL

RIBBON CABLE

BLK YEL

SLOW BLOW FUSE

(5X20mm 5A)

CON1

POWER

TERMINAL

BLOCK

FIGURE 10 – 208 VAC Wiring Diagram when using Supplied Humidistat

90-1904

INSTALLATION INSTRUCTIONS (CONTINUED)

HUMIDITY CONTROL

(PROVIDED)

FAN PACK

(OPTIONAL)

DOOR SWITCH

POWER

TERMINAL

BLOCK J8 J10 J16

J5 J6

J11

120

VAC

J13

208

VAC

J14

240

VAC

CONTROL CIRCUIT WIRING

HIGH VOLTAGE WIRING

HIGH VOLTAGE FIELD WIRING

ORANGE

BLK

YEL

TRANSFORMER POWER

JUMPER WIRE

BLK/WHT

YEL

BLUE

TRANSFORMER

LOW VOLTAGE FIELD WIRING

DRY

CONTACT

WHT

RED

BLK

ORG

FAN PACK

HUMIDISTAT

RESIDENTIAL STEAM HUMIDIFIER

IS SHIPPED FROM THE FACTORY

WIRED FOR 240 VOLTS. MOVE THE

JUMPER WIRE TO TERMINAL J11

TO OPERATE AT 120VAC.

MAIN POWER BREAKER

(NOT PROVIDED)

L2 / N

GND

DRAIN

VALVE

FILL

VALVE

DISPLAY PANEL

RIBBON CABLE

BLK YEL

SLOW BLOW FUSE

(5X20mm 5A)

CON1

ELECTRODE

WATER LEVEL

PROBE

ELECTRODE

STEAM CANISTER

FIGURE 11 – 120 VAC Wiring Diagram when using Supplied Humidistat

90-1905

INSTALLATION INSTRUCTIONS (CONTINUED)

CONTROL WIRING

The Steam Humidifier may be connected directly to the humidistat terminals on any Connected Thermostat Controls. If not using a Connected

Control, install manual humidifier control with the Blower Activation Relay. See Figures 13, 14, 15 for wiring options.

The control circuit operates on 24 VAC. Install manual humidifier control and blower activation relay as shown in Figure 12. If protection from

over-humidification is desired, install optional high humidity limit switch at least 4 feet downstream of the dispersion tube.

MANUAL

HUMIDIFIER

CONTROL

TYPICAL 24 VAC

TERMINAL STRIP

IN FURNACE THERMOSTAT

BLOWER ACTIVATION

RELAY

REMOVE WIRE

“G” TO “G”

HIGH HUMIDITY

LIMIT SWITCH

STEAM

HUMIDIFIER

(OPTIONAL)

NOTES:

1. 18AWG WIRE IS ACCEPTABLE FOR 24V INSTALLATIONS.

2. “FAN PACK” TERMINALS PROVIDE 24 VAC ON CALL FOR HUMIDITY AND REMAIN ENERGIZED FOR

TWO MINUTES AFTER CALL IS SATISFIED.

BLUE (NC)

ORANGE (NO)

YELLOW (C)

WHITE/YELLOW

WHITE/BLUE

FAN PACK HUMIDISTAT

FIGURE 12 – Wiring with Manual Humidifier Control

90-1706

INSTALLATION INSTRUCTIONS (CONTINUED)

HUMIDISTAT

HUM

Bk-PWM

G-FAN

STEAM HUMIDIFIER

24 VOLT RELAY PANEL

CIRCUIT

BOARD

AUX 2

AUX 1

AUX 2

AUX 1

WH/1

Bk/3

B/2k

{Bk

BkWH

EAC {WH

HUMIDISTAT

STEAM HUMIDIFIER

CIRCUIT

BOARD

To 115V 1PH

60Hz power

supply

(per local codes)

110V ISOLATION

RELAY P/N

RLY00636

AUX 2

AUX 1

AUX 2

AUX 1

1/2

1/1

RS1

ODT

RS1

ODT

B/C

HUMIDISTAT

STEAM HUMIDIFIER

824/624 CONTROL

CIRCUIT

BOARD

FIGURE 13 – Steam

Humidifier using 850

or 950 Control Wired

to 24 Volt Relay Panel

(BAY24VRPAC52D)

FIGURE 15 – Steam Humidifier Wiring for Communicating Furnaces using 110 Volt HUM Output from Furnace

FIGURE 14 – Steam

Humidifier Wired to

824 or 624 Control

90-2164

90-2166

90-2165

START-UP PROCEDURE

1. Once the supply water, drain, steam hose, electrical power and control wiring connections are complete, make sure canister is fully seated

into drain valve and three wire connectors on top of canister are secure. (High water probe wire and two interchangeable electrode wires.)

2. Attach side panel and front door.

3. Open saddle valve allowing water to flow to humidifier. Check for leaks.

4. Turn humidistat to OFF.

5. Close main power switch energizing humidifier.

6. Press “On/Off” button on humidifier. The “On/Off” light will illuminate green.

7. Make sure the HVAC blower is operating and adjust the humidistat to initiate a call for humidity.

The “Steam” light will illuminate green indicating a call for humidity and the “Fill” light will illuminate green indicating the fill valve is open

allowing the canister to fill. You should also hear the water flowing. If water flows down drain while humidifier is filling, check for

kinks or obstructions in the fill hose or fill cup and make sure the O-ring in the drain valve is properly seated in the groove and

not damaged or deformed.

8. Once the “Fill” light turns off, to verify that the humidifier will drain properly, press the “On/Off” button to turn humidifier off. You may hear

the fill valve open allowing cold water to flow into the canister to cool the water in the canister. The “Drain” light will flash green for 15

seconds then turn green for four minutes while the canister drains. Once the “Drain” light turns off, the drain cycle is complete.

9. Set the humidistat to proper level.

10. Press “On/Off” button to turn humidifier on.

When the humidifier is powered and turned on, the “On/Off” light is illuminated green.

During fill cycles, the “Fill” light illuminates green.

When the humidifier is turned on, any time the Humidifier Control sends a call for humidity, the “Steam” light illuminates green.

Any time the drain valve is activated, the “Drain” light illuminates green.

During initial start up with a new canister, the humidifier may run through a series of fill/drain cycles until the conductivity of the water is in

a range that allows the humidifier to generate steam at the rated capacity. If the conductivity of the water is low, it may take a week or more

for the humidifier to generate steam at the rated capacity. The rated capacity is achieved when the humidifier is detecting a nominal current

of either 11.5 or 16.0 amps between the electrodes. If the humidifier has not reached capacity after 168 hours of operation, the “Steam” light

will illuminate yellow on a call for humidity. The humidifier will continue to operate with a yellow “Steam” light, and may satisfy the humidity

requirements. Once rated capacity is reached, the “Steam” light will illuminate green.

The internal controller adjusts water level in the canister to maintain the nominal current between the electrodes. As minerals build up on the

electrodes, their effectiveness decreases, so the controller will increase the water level to submerge more of the electrode surface. When the

water has reached the high level probe in the canister and the internal controller no longer detects nominal current, the “Service” light will flash

red indicating that the canister needs to be replaced.

If the humidifier attempts to drain the canister and cannot, the drain and fill valves will pulse on and off for four seconds to dislodge minerals

which may be blocking the drain valve ports. The “Drain” and “Fill” lights will flash on and off when this occurs.

Any time power is disconnected or humidifier is turned off, the internal timer for start-up and drain cycles is reset.

If the humidifier has operated 168 hours without a drain cycle, the drain valve will open and drain the canister. Normal operation will continue.

If the humidifier is operating and a power failure occurs, once power is restored, the “On/Off” light will flash green for one minute, then the

humidifier will turn on.

OPERATING MODES

END OF SEASON/PERIOD OF INACTIVITY SHUT-DOWN

The humidifier does not need to be turned off at the end of the humidification season. If 72 hours elapse without receiving a call for humidity,

the canister will automatically drain. The “Drain” light will remain lit for 24 hours. This may also occur during periods of inactivity during the

humidification season. The humidifier will resume normal operation when a call for humidity is made.

To turn humidifier off, push “On/Off” button once. Humidifier will begin its four-minute drain cycle. Fill valve will open to temper drain water. The

“Drain” light will flash green for 15 seconds then turn solid green for four minutes while the canister drains. Once the “Drain” light turns off, the

drain cycle is complete and the humidifier is off.

SHUT DOWN PROCEDURE

DISPLAY PANEL

TABLE 5 – Display Panel

Indicator Light Function

Off Humidifier is turned off or power is disconnected.

Solid green Humidifier is turned on.

Flashing Green Humidifier is preparing to turn on. Occurs if power to humidifier was turned off when humidifier

was on. Humidifier turns on after light flashes for one minute.

Off Fill valve not energized.

Solid Green Fill valve is energized, filling or replenishing canister with water. (During drain cycle when fill valve

is open allowing cold water into canister to temper drain water, the “Fill” light does not illuminate.)

Flashing Green Fill and Drain Valves are pulsing to dislodge mineral deposits from drain. Flashes 10 times in 4

seconds. Occurs if high water probe detects water during drain cycle.

Solid Red Humidifier cannot fill canister. Humidifier stops operating. Occurs after fill valve has been energized

for 40 minutes and high water probe does not detect water.

Off Humidifier is not producing steam.

Solid Green Humidifier is turned on and receiving a call for humidity from the control.

Solid Yellow Humidifier is producing steam but at less than the rated capacity. Occurs if humidifier has operated

for 168 hours and has not reached nominal current.

Off Drain valve is not energized.

Solid Green Drain valve is energized, allowing water to drain from canister.

Flashing Green Humidifier is preparing to drain. Flashes for 15 seconds indicating fill valve is open allowing cold

water into canister.

Flashing Red

Canister has reached end of life. Humidifier continues to operate but at reduced capacity. Occurs

after humidifier has operated for 168 hours plus another 24 hours at less than 75% of the maximum

operating current level between electrodes.

Solid Red Humidifier is not operating and requires service.

Green lights indicate normal operation.

Yellow “Steam” light indicates humidifier is operating at less than rated capacity.

Flashing red “Service” light indicates canister is near the end of its life and should be replaced if the humidity in the space cannot be maintained.

Solid red lights indicate humidifier has shut down and requires service.

Disconnecting power to humidifier resets internal timers.

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Trane EHUMD800ASM00BA Steam Humidifier Owner's manual

Brand: Trane

Model: EHUMD800ASM00BA Steam Humidifier

Type: Owner's manual

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Trane EHUMD800ASM00BA Steam Humidifier Owner's manual

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